LTE Voice and IMS Overview

3 Days / 5 Live Online Sessions (0900-1230) / Technical Level: Level 3

Course Code: LT1602

Course Summary

This course provides a detailed technical description of the architecture and operation of the IP Multimedia Subsystem, and its use for the delivery of a VoIP service over LTE.

Who would benefit

This course is suitable for engineering and technical management staff who require a technical description of the options that exist in LTE and the IP multimedia subsystem for delivering voice and other real-time traffic types, that would traditionally have been carried by Circuit-Switched (CS) technologies.


Attendance on this course assumes previous attendance on the LTE Engineering Overview course (LT3600) or equivalent basic LTE knowledge (although a recap of basic LTE architecture and concepts is provided at the start of the course) and also assumes a working knowledge of IP.

Topic Areas Include

  • Technical overview of LTE

  • Introduction to the options for LTE voice

  • Session Initiation Protocol (SIP)

  • Session Description Protocol (SDP)

  • Architecture and operation of the IP Multimedia Subsystem (IMS)

  • Control and user plane functions of the IMS

  • Service delivery in the IMS

  • System architecture for Voice over LTE (VoLTE)

  • VoLTE protocols, services and codecs

  • VoLTE power-on and registration procedures

  • VoLTE call setup procedures

  • Access domain selection

  • Single Radio Voice Call Continuity (SRVCC)

  • Delivery of SMS messages over the IMS

  • VoLTE emergency calls

  • Voice over Wi-Fi

This course appears in the following collections